Circumferential Notch Tensile Technique Research Articles

Studying the effect of sensitization on the threshold stress intensity and crack growth for chloride stress corrosion cracking of austenitic stainless steel using circumferential notch tensile technique

This paper discusses determination of threshold stress intensity factor (KIscc) and crack growth rate of austenite stainless steel in 42wt.% MgCl2 environment at 154°C using the circumferential notch tensile (CNT) technique. The KIscc and crack growth rate of solution annealed and sensitized AISI 304 stainless steel in chloride environments have been determined using the CNT technique. Valid KIscc data have been produced and compared with results obtained by compact tension and double cantilever beam methods. The KIscc of sensitized stainless steel is ∼50% lower than the solution annealed AISI 304 stainless steel. This work investigated the applicability of the CNT technique to determine the KIscc of thin and narrow sections of solution annealed and sensitized stainless steel in the chloride environment. This paper also discusses the mechanistic aspects of the difference in fractographic features of the sensitized and solution annealed stainless steel.

Determination of threshold stress intensity for chloride stress corrosion cracking of solution-annealed and sensitized austenitic stainless steel by circumferential notch tensile technique

This paper discusses a new approach to determination of threshold stress intensity factor for stress corrosion cracking (KISCC) of stainless steel in 42% MgCl2 environment at 154 °C. KISCC of solution-annealed and sensitized AISI 304 stainless steel in chloride environment has been determined using circumferential notch tensile (CNT) technique. KISCC data generated using CNT technique have been compared with those generated using traditional techniques such as compact tension and double cantilever beam (reported in the literature). The results presented here validate the ability of CNT technique for determination of KISCC of sensitized as well as solution-annealed austenitic stainless steel. This paper also discusses the mechanistic aspects of the difference in fractographic features of the sensitized and solution-annealed stainless steel.